Rules for issuing redeemable preference share

Hi

Please let me inform about

1. What are the general rules for private placement of redeemable preference share by a public limited companies

2. Is there any rule(s) pertaining to allotement of redeemable preference share on private placement basis, which restrict to allot RPS to less than 50 investors only? OR

2. Is it not possible to allot redeemable preference share to more than 50 persons on private placement basis by a public limited company?

3. To whom, this redeemable preference share can be offered/issued/alloted, on private placement basis? Is there any restriction?

4. If so, then how can it be handled/overcomed,

regards

Neel